Improve me nt in vertical-disk grinding-m i lls



D. HESS. Vertical Disk Grinding-Mill.

No. 210,936. Patented Dec. 17, I878.

WITNESSES IN NTOR H.PETERS, PMOTD-UYNOGMFNER. WASHINGTON u c ATTORNEY UNIT A l. ATEN'.

DANIEL HESS, OF EVANSVILLE, INDIANA.

IMPROVEMENT lN VERTlCAL-DISK GRlNQENG-MELLS.

Specification forming part of Letters Patent No. 210,936., dated December 17,1878; application filed August 26, 1878."

To all whom it may concern:

Be it known that I, DANIEL Hess, of Evans ville, in the county of Vanderburg and State of Indiana, have invented certain new and useful Improvements in GrindingMills and I do hereby declare that the followin is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 is a vertical longitudinal sectional view taken through the drivingshait of grinding-mill embodying the improvements of my invention. Fig. 2 is a face view of the revolvin g burr, showing the outer emery or stone ring and the inner steel rim. Fig. 3 is a view of the conical burr that revolves within the stationary burr.

This invention has relation to grindingmills; and consists in the improvements in the construction of the same hereinafter fully described, and particularly pointed out in the claim.

In the accompanying drawings similar letlers of reference indicate corresponding parts in the several figures.

The operating mechanism is incased in a removable shell, A, provided witn a hopper, B, in order that it may be exposed at any time for inspection, removal, or repairs. The driving-shaft G is supported in hearings to arising from the horizontal bed-plate- D, provided with a discharge orifice or slot, 1), through which the mealor feed falls to any appropriate receptacle. One end of the driving-shaft (J is provided with a band-wheel, E or a crank may be attached for driving it. At the other end of said driving-shaft O a set-screw, c, is employed for adjusting it to cause the burrs to grind coarse or line. Near one end of the horizontal bed-plate D standards cl (1 rise, and between these standards (I d and the adjustable vertical bed-plate F, and cast with the latter, is the sup 'ily-chamber G. The adj ustable vertical bed-plate F is connected by adjusting-rods c 0, having screw-threads at both ends, provided with nuts f f on each side of the standards and on each side of the vertical bed-plate, in order that the vertical bed-plate 1 I), which carries the nonrevolving burr H, may be adjusted to regulate the burrs to cause them to grind the grain to the required time ness. Upon the driving-shaft C, and projecting within and entirely across the supplychamber G, is a spiral ly-iianged feeder, I,which is made adjustable upon the shaft C and within the supply-chamber G by a set-screw, h, in order that the feeder may be adjusted when the vertical bed-plate F is adjusted.

The non-revolvin burr H and the revolving burr J are each composed of an inner steel ringyi i, and an outer emery or artificial-stone ring, j j. The rings ij, composing the revolving burr J, are secured to the flange K (which is provided with a hub, 7c, and a setscrew for rendering it adjustable upon the drivingshaft C) by means of studs m, secured to the rings a" and j, passed through slots n in the flange K, and fastened by pins 0. The rings ij, composing the non-revolving burr H, are secured to the adjustable vertical bedplate in the same manner.

Upon the shaft 0, and within circular recesses in the burrs H and J, is a conical steel grinder, L, secured to the'shaft (J by set-screws. A disk or ring, L, which really forms a part of the conical steel grinder, L, has saw-teeth in its face, and is made separately from the part L, in order that it may be removed for the purpose of sharpening it. This portion L fits the circular recess made for it in the revolvin g burr J, and their faces are always adjusted to the same vertical plane.

Within the circular recess in the 11on revolving burr H a steel ring, L having teeth on its inner periphery, is placed, and forms a portion of the conical grinder L L.

The conical steel grinder L L forms a separate and inde 'iendent mill, and may be used to grind feed, fee, when coarse grinding is required, without bringing the large or outer burrs into operation at all, by simply adjust in g them sufficiently far apartto prevent them from operatin hen it is desired to use the mill for grinding meal, 850., the larger or outer burrs are adjusted to grind the grain to meal or flour after it has been first coarsely ground by the conical steel grinders; and as it passes from the center to the circumference of the grinders and burrs, and the steel rings 2 z" are finer than the conical grinder L L, and the emery or stone ringsjj are still finer than the steel rings z 41, by the time the grain has reached the point of discharge it has become flour or meal, as the case may be.

In a working machine the larger burrs, H

' J, need be only about six inches indiameter,

and a mill having burrs of this size will grind from eight to ten bushels of grain per hour. In this there is actually a combination of two mills in one, and they may be used together or separately.

In grinding feed for stock the conical grinders will be used alone. They grind rapidly and easily, from the fact that the grinding is done near the shaft. They may be easily and cheaply sharpened when dulled by use, and replaced at little cost when worn out.

The larger burrs should be used when meal or flour is to be ground, and at this time both mills are operated.

Although I prefer to use alternate steel and emery rings for the burrs, I may use all steel rings, and secure them to the flange K and vertical bed-plate F in the manner described for securing the alternate steel and emery rings.

Having thus described my invention, what I claim as new and useful, and desire to. secure by Letters Patent of the United States, 1s

The reces'sed adjustable revolving burr J, in combination with spindle O,'provided with grinding-disk L and cone L, and bed-stone H, provided with grinding-concave L whereby the'grinding may be done with or without the operation of the burr-stones, as described, and I in the manner set forth.

In testimony that I claim the foregoing as my own I hereby affix my signature in presence of two witnesses.

DANIEL HESS.

Witnesses J. S. GARDNER, J r., P. MAIER. 

